An IPC has the composite stream function enabled by default, that is, both audio and video streams are enabled. You only need to connect the audio input device to the IPC, without the need to enable any audio streams.
You can modify the audio/video stream parameters on the Settings > Channel Configuration > Video&Audio Stream Parameters page.
NOTE
To use the audio stream function on the video surveillance platform, enable the channel-associated voice on the platform. For details, see the platform documents.
